COI Report – Part VI
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425 Key Finding #3: There were a number of vulnerabilities, weaknesses, and misconfigurations in the SingHealth network and SCM system that contributed to the attacker’s success in obtaining and exfiltrating the data, many of which could have been remedied before the attack
A significant vulnerability was the network connectivity (referred to in these proceedings as an open network connection) between the SGH
Citrix
servers and the SCM database, which the attacker exploited to make queries to the database. The network connectivity was maintained for the use of administrative tools and custom applications, but there was no necessity to do so.
The SGH Citrix servers were not adequately secured against unauthorised access. Notably, the process requiring factor authentication (“
2FA”) for administrator access was not enforced as the exclusive means of logging in as an administrator. This allowed the attacker to access the server through other routes that did not require
2FA.
There was a coding vulnerability in the SCM application which was likely exploited by the attacker to obtain
credentials for accessing the SCM database. There were a number of other vulnerabilities in the network which were identified in a penetration test in early 2017, and which may have been exploited by the attacker. These included weak administrator account passwords and the need to improve network segregation for administrative access to critical servers such as the domain controller and the Citrix servers. Unfortunately, the remediation process undertaken by IHiS was mismanaged and inadequate, and a number of vulnerabilities remained at the time of the Cyber Attack.
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